<template>
  <div class="todo-footer" v-show="todos.length">
    <label>
      <input type="checkbox" :checked="isAll" @change="checkAll" />
    </label>
    <span>
      <span>已完成{{ doneTotal }}</span> / 全部{{ todos.length }}
    </span>
    <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "MyFooter",
  props: ["todos", "checkAllTodo", "clearAllTodo"],
  computed: {
    doneTotal() {
      // return 99;
      var wancheng = this.todos.filter((todo) => {
        return todo.done == true;
      });
      return wancheng.length;
    },
    isAll() {
      if (this.todos.length == 0) return false;
      return this.doneTotal == this.todos.length ? true : false;
    },
  },
  methods: {
    checkAll(e) {
      this.checkAllTodo(e.target.checked);
    },
    clearAll() {
      if (confirm("确定删除？")) this.clearAllTodo();
    },
  },
};
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>